What is the sum of the integers from -150 to 155, inclusive?	Choose the correct choice:	A) 865	B) 955	C) 1050	D) 765	E) 750
In an arithmetic progression,   the nth term is given by tn=a+(n-1)d   here tn=155, a=-150, d=1   hence, 155=-150+(n-1)   or n=306   Sum of n terms can be calculated by sn=n/2(a+l)   a=first term, l=last term, n=no. of terms   sn=306*(-150+155)/2   sn=306*5/2= 
<gadget id="calculator">306*5/2</gadget>
<output>765</output>
765   Answer : 765
<result>D</result>
What is the sum of the integers from -150 to 155, inclusive?