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Question

If vertical line a with not stretchy bar on top vertical line equals 3 comma vertical line b with not stretchy bar on top vertical line equals 4 text  and  end text left parenthesis a with not stretchy bar on top comma b with not stretchy bar on top right parenthesis equals pi over 2 text , then  end text vertical line a with not stretchy bar on top plus b with not stretchy bar on top vertical line equals

  1. 6
  2. 5
  3. 4
  4. 3

Hint:

In this question we have to find open vertical bar top enclose a plus top enclose b close vertical bar for this we will first square it then put the given values.

The correct answer is: 5


    open vertical bar top enclose a close vertical bar equals 3 comma space open vertical bar top enclose b close vertical bar equals 4 space a n d space open parentheses top enclose a plus top enclose b close parentheses equals straight pi over 2

open vertical bar top enclose a plus top enclose b close vertical bar squared equals open vertical bar top enclose a close vertical bar squared plus open vertical bar top enclose bold b close vertical bar squared plus open vertical bar 2 top enclose. a end enclose cross times top enclose b close vertical bar
rightwards double arrow open vertical bar top enclose a plus top enclose b close vertical bar squared equals 3 squared plus 4 squared plus 2.0 space space space space left parenthesis top enclose a cross times top enclose b equals 0 right parenthesis
rightwards double arrow open vertical bar top enclose a plus top enclose b close vertical bar squared equals 9 plus 16 plus 0
rightwards double arrow open vertical bar top enclose a plus top enclose b close vertical bar squared equals 25
rightwards double arrow open vertical bar top enclose a plus top enclose b close vertical bar equals 5

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