1.

2, 7,12...... to 10term?

Answer» a¹⁰=a+(n-1)da¹⁰=2+(10-1)5a¹⁰=2+45a¹⁰=47
S10 = a + (n -1) d = 2 + ( 10-1) 5= 2 + 9 x5 = 2 + 45 = 47


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