Question

find sum of these 75 numbers
1+3+5+.....+149

a=1 and d = 2,n=75

FILL UP THE _____.

method 1:-

Sn = n/2 [2a+(n-1)d]

Sn = _______________

Sn = _____ ×_____

Sn = _____



SUBJECT ALGEBRA- ARITHMETIC PROGRESSION

SSC ..

PG NO 71 TEXT BOOK​

Answer 1

Answer:

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

=75/2{2×1+(75-1)2}

=75/2{2+148}

=75/2×150

=75×75

=5625

Answer 2

ṧ✺ℓṳт!✺ℵ :-

☑.•♫•Refer to the attachment! •♫•.

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