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Dear sir, please show me the sum 78 n 79 sum

Dear sir,  please show me the sum 78 n 79 sum

Question Image
Grade:10

1 Answers

Jitender Singh IIT Delhi
askIITians Faculty 158 Points
6 years ago
Ans:
Hello student,
Please find the answer to your question below,
Your qustion is not clear.
Please upload the image of the questions.
All the sums in the answers you have uploaded is quite clear.
In 78, he uses the inquality
AM\geq GM
In 79, he just convert the expression into square form & equate it to greater than zero.

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