Math, asked by sanz13011, 5 months ago

Q7. without adding find the sum.
i) 1+3+5+7+9
ii) 1+3+5+7+9+13+15+19
iii) 1+3+5+7+9+13+15+19+21+23

Answers

Answered by Masterscientist

0

Step-by-step explanation:

Count the number of terms Sum = n²

Hence 1+3+5+7+9 = 25

Similarly in (ii) part let the counting be 1+3+5+.......+17+19= 10² - 11 -17= 72

In (iii) it will be 116

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