Question

For an AP 7, 11, 15, 19,...... find the sum of first 50 terms. *

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

AP=7,11,15,19..........

In order to find Sn

a=7 , d=4

Sn=n/2{2a+(n-1)d}

S50=50/2{2(7)+(50-1)4}

S50=25{14+(49)4}

S50=25{14+196}

S50=25{210}

S50=5250

THEREFORE THE SUM OF FIRST FIFTY TERMS ARE :- 5250

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